oj.uz

Submission #787007

# Submission time Handle Problem Language Result Execution time Memory
787007 2023-07-18T16:25:32 Z Rafi22 Furniture (JOI20_furniture) C++14
100 / 100
 226 ms 13932 KB 
#include <bits/stdc++.h>

using namespace std;

#define endl '\n'
#define st first
#define nd second
#define pb push_back
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
#define ll long long
ll mod=1000000007;
int inf=1000000007;
ll infl=1000000000000000007;

const int N=1007;

int ile[2*N];
bool a[N][N];
bool odw[N][N];

int dx[4]={1,-1,0,0};
int dy[4]={0,0,1,-1};

int n,m;
bool good(int i,int j)
{
    return min(i,j)>0&&i<=n&&j<=m;
}

bool check(int i,int j)
{
    bool is=1,is1=1;
    if((i==n&&j==m)||(i==1&&j==1)) return 0;
    if(good(i-1,j)&&!odw[i-1][j]) is=0;
    if(good(i,j-1)&&!odw[i][j-1]) is=0;
    if(good(i+1,j)&&!odw[i+1][j]) is1=0;
    if(good(i,j+1)&&!odw[i][j+1]) is1=0;
    return is|is1;
}

void dfs(int i,int j)
{
    odw[i][j]=1;
    ile[i+j]--;
    for(int l=0;l<4;l++)
    {
        int ni=i+dx[l],nj=j+dy[l];
        if(good(ni,nj)&&!odw[ni][nj]&&check(ni,nj)) dfs(ni,nj);
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>m;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=m;j++)
        {
            ile[i+j]++;
            cin>>a[i][j];
        }
    }
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=m;j++)
        {
            if(a[i][j]&&!odw[i][j]) dfs(i,j);
        }
    }
    int q;
    cin>>q;
    while(q--)
    {
        int x,y;
        cin>>x>>y;
        if(a[x][y]||(!odw[x][y]&&ile[x+y]==1)) cout<<0<<endl;
        else
        {
            a[x][y]=1;
            if(!odw[x][y]) dfs(x,y);
            cout<<1<<endl;
        }
    }



    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 3 ms 596 KB Output is correct
7 Correct 3 ms 596 KB Output is correct
8 Correct 3 ms 596 KB Output is correct
9 Correct 3 ms 592 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 3 ms 596 KB Output is correct
7 Correct 3 ms 596 KB Output is correct
8 Correct 3 ms 596 KB Output is correct
9 Correct 3 ms 592 KB Output is correct
10 Correct 8 ms 724 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 116 ms 6860 KB Output is correct
13 Correct 53 ms 4048 KB Output is correct
14 Correct 194 ms 11688 KB Output is correct
15 Correct 211 ms 11952 KB Output is correct
16 Correct 226 ms 12752 KB Output is correct
17 Correct 215 ms 13512 KB Output is correct
18 Correct 210 ms 13128 KB Output is correct
19 Correct 225 ms 13800 KB Output is correct
20 Correct 216 ms 13932 KB Output is correct
21 Correct 217 ms 13852 KB Output is correct